Basler Electric BE1-11m - Manual (Page 194)

182 9424200996 Rev L
Voltage
Figure 144 illustrates the Power Quality, Voltage screen.
Figure 144. Power Quality, Voltage Screen
10-Second Frequency
A 10-second average of the frequency is calculated using Equation 20.
𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝐼𝑛𝑡𝑒𝑔𝑟𝑎𝑙 𝐶𝑦𝑐𝑙𝑒𝑠
𝑇𝑜𝑡𝑎𝑙 𝐷𝑢𝑟𝑎𝑡𝑖𝑜𝑛 𝑜𝑓 𝐼𝑛𝑡𝑒𝑔𝑒𝑟 𝐶𝑦𝑐𝑙𝑒𝑠
Equation 20. 10-Second Frequency Calculation
Example
Number of integral cycles: 501 cycles over 10 s
Total duration of the 501 cycles: 9.998 s
10-Second Frequency = 501/9.998 = 50.1100 Hz
Distortion
The voltage during a dip is often distorted. This distortion may be important for understanding the effect of
the dip on the system. The BE1-11m calculates distortion using Equation 21.
�
𝑉
𝑇𝑜𝑡𝑎𝑙
𝑉
𝐹𝑢𝑛𝑑𝑎𝑚𝑒𝑛𝑡𝑎𝑙
− 1� × 100
Equation 21. Distortion Calculation
Figure 145 illustrates the Power Quality, Distortion screen.
Figure 145. Power Quality, Distortion Screen
Dip/Swell
Figure 146 illustrates the Power Quality, Dip/Swell screen. A green LED indicates that the threshold
specified in Power Quality Settings has been exceeded.
Power Quality BE1-11m